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Regulations last checked for updates: Jan 13, 2026
Title 21 - Food and Drugs last revised: Dec 18, 2026
All Titles
Title 21
Chapter I
Part 331
Subpart B - Subpart B—Active Ingredients
§ 331.10 - Antacid active ingredients.
§ 331.11 - Listing of specific active ingredients.
§ 331.15 - Combination with nonantacid active ingredients.
authority:
21 U.S.C. 321
,
351
,
352
,
353
,
355
,
360
,
371
source:
39 FR 19874, June 4, 1974, unless otherwise noted.
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